FEPA P-grade · Converted
P240 in CAMI grit and microns.
P240 paper averages about 58.5 µm on the FEPA table. On the US CAMI scale that is about CAMI 240. A sheet printed plain "240" is about 53 µm, close enough that the P barely matters at this grade.
- Avg. particle
- ~58.5 µm
- FEPA table
- Nearest CAMI
- 240
- by particle size
- Plain "240"
- ~53 µm
- CAMI 240 ≈ P280
- 3M Trizact
- ·
- no A-grade paired by 3M
What P240 is for
Sanding primer and fine pre-finish work.
Either side of P240
The neighborhood.
Questions people ask
What is P240 in CAMI grit?
About 240. P240 averages 58.5 microns on the FEPA table and CAMI 240 averages 53, so the scratch is close to the same.
How many microns is P240 sandpaper?
About 58.5 microns average particle diameter, per the FEPA P-grade table (ISO 6344).
Is P240 the same as 240 grit?
Close enough to treat as the same. P240 averages 58.5 microns and CAMI 240 (a bare "240" on US paper) averages 53.
Convert any other grade, from CAMI, microns or a Trizact A-number, on the grit converter.
Sizes are average particle diameters from the published FEPA (ISO 6344) and CAMI (ANSI B74.12/B74.18) tables. "Nearest" means within 10%; otherwise both neighbors are shown. Trizact pairings are 3M's own. Sources: Wikipedia, "Sandpaper" grit table (rev. 1127917881); Klingspor coated abrasives grit chart.